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The coordinates of two consecutive vertices `A` and ` B` of a regular hexagon `A B C D E F` are `(1,0)` and `(2,0),` respectively. The equation of the diagonal `C E` is (a)`sqrt(3)x+y=4` (b) `x+sqrt(3)y+4=0` (c)`x+sqrt(3)y=4` (d) none of these

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